A : B+ Line. B : B� Line. Voltages are dc with respect to ground under no-signal conditions. no mark : Power on Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. � Signal path. F : AUDIO � Abbreviation CND : Canadian model MY : Malaysia model SP : Singapore model AUS : Australian model TW : Taiwan model